The flux of the radio quiet Sun and the brightness temperature at 408 MHz (73 cm) are derived from measurements with the E-W Nangay interferomcter and the E-W arm of the Medicina North Cross. It is shown that the lowest envelopes, which defined the radio quiet Sun, correspond to transits of extended
Quiet sun brightness temperature in the millimeter-wavelength range
โ Scribed by S. A. Pelyushenko
- Book ID
- 112469186
- Publisher
- Springer US
- Year
- 1982
- Tongue
- English
- Weight
- 389 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0033-8443
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๐ SIMILAR VOLUMES
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A re-analysis of the brightness distribution of the quiet Sun at 1.2 mm wavelength is made. It is concluded that there is no evidence for uniform or limb-brightened distribution at this wavelength. \* NAS-NRC Research Associate on sabbatical leave from the University of Maryland.
Unique long-term visibility variations are detected when the quiet Sun is observed with interferometers operating at 8 mm and 11 cm wavelength with angular resolutions of -0.5'. Quasiperiodic fluctuations in fringe amplitude are observed with periods between 20 and 30 rain, and with amplitude nulls